#include<stdio.h>
#include<unistd.h>
#include<string.h>

int main()
{
	for(int errcode = 0;errcode <= 255; errcode++)
	{
		printf("errcode: %d, strerror:: %s\n",errcode,strerror(errcode));
	}

	printf("I am process, pid: %d, ppid: %d\n",getpid(),getppid());
	sleep(2);
	return 0;
}
